Double-layer metal roof structure

Abstract

The utility model discloses a double-layer metal roof structure, and relates to the technical field of constructional engineering. Comprising main purlins; a vapor barrier film is laid above the metal roof inner plate; the metal roof inner plate is connected to the upper portion of the main purline through a base protruding out of the metal roof inner plate. The heat preservation rock wool board is laid above the vapor-proof film; a waterproof coiled material is laid above the heat preservation rock wool board; a boss protruding out of the top face of the heat preservation rock wool board is formed in the area, covering the base, of the heat preservation rock wool board. The support is connected to the top surface of the base through a connecting piece penetrating through the waterproof roll; every two adjacent metal roof outer plates are mutually locked and are connected to the upper part of the base through the supports; the upper layer purlin is omitted, so that the heat preservation layer is not limited by the height of the upper layer purlin, the thickness of the heat preservation layer is reserved, and the heat preservation performance of the roof system is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, specifically relates to a double -deck metal roof structure. BACKGROUND

[0002] At present, there are two ways for connecting structure of double -deck metal roof panel in building, the first way is that the roof purlin upper and lower sides are paved with roof outer plate and roof inner plate, the second way is that the roof outer plate and the roof inner plate are respectively paved on the upper and lower sides of the layer level purlin, the main purlin is exposed to be connected with the suspension.

[0003] The first connecting structure will cause the construction difficulty of the roof system roof inner plate to increase, the reverse installation of the roof inner plate needs the help of the lower elevatable scaffold, which increases the construction cost and has great safety hidden danger in the construction process, and the second connecting structure will cause the roof system to need to set double -deck roof purlin, thereby increasing the material and construction cost, increasing the space, in addition, the thermal insulation layer is compressed due to the limitation of the height of the secondary purlin of the roof system, thereby weakening the thermal insulation performance of the roof system, so that the roof system is prone to heat bridge phenomenon. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a double -deck metal roof structure to solve the problem of great construction difficulty in the connecting structure of the metal roof panel in the prior art, the thermal insulation layer is compressed due to the limitation of the height of the secondary purlin, and the thermal insulation performance of the roof system is reduced.

[0005] The utility model adopts the technical scheme that:

[0006] A double -deck metal roof structure comprises:

[0007] Main purlin;

[0008] Metal roof inner plate, upper side is paved with vapour barrier;The metal roof inner plate is connected on the upper side of the main purlin through the base that is protruded on the metal roof inner plate;

[0009] Thermal insulation rock wool board, is paved on the upper side of the vapour barrier;The thermal insulation rock wool board upper side is paved with waterproof roll material;The area of the thermal insulation rock wool board covering the base forms the boss that is protruded on the top surface of the thermal insulation rock wool board;

[0010] Support is connected on the top surface of the base through the connecting piece that passes through the waterproof roll material;

[0011] Multiple metal roof outer plates, the mutual locking between the adjacent two metal roof outer plates is connected on the upper side of the base through the support.

[0012] The double -deck metal roof structure of the utility model still has the following additional technical features:

[0013] The metal inner roof panel is in a wavy structure, and the peak section and the valley section of the metal inner roof panel are in a planar structure.

[0014] The base comprises a base body, and symmetrical supporting edges are connected to two sides of the base body, and the supporting edges and the base body are connected to form a U-shaped structure.

[0015] The supporting edge can be embedded in the valley section, and the supporting edge has a plurality of pre-punching holes, and the supporting edge is fixedly connected with the valley section by connecting members penetrating into the pre-punching holes.

[0016] The width of the supporting edge on both sides is not less than 24 mm, and the width of the base body is not less than 60 mm.

[0017] The height of the base is higher than the thickness of the thermal insulation rock wool board by 10-15 mm.

[0018] The metal outer roof panel comprises an outer panel body, a female rib in a trapezoidal structure connected to one side of the outer panel body, and a male rib in a trapezoidal structure connected to the other side of the outer panel body.

[0019] The female rib has a first hook, and the male rib has a second hook; the first hook of the female rib of one of the two adjacent metal outer roof panels is connected with the second hook of the male rib of the other one, the supporting seat has a locking part extending between the first hook and the second hook, and the first hook and the second hook and the locking part are bent to achieve locking connection.

[0020] The metal outer roof panel adopts a steel plate with a thickness of 0.53-0.6 mm and a strength of 300-350 MPa; and the metal inner roof panel adopts a steel plate with a thickness of more than 0.4 mm and a strength of 500-550 MPa.

[0021] The waterproof roll material adopts TPO or PVC material, and the thickness of the waterproof roll material is not less than 1.2 mm.

[0022] Due to the adoption of the above technical solutions, the utility model has the beneficial effects as follows:

[0023] 1. The application discloses a double-layer metal roof structure comprising a main purlin, a metal roof inner plate, an insulation rock wool board, a support and a plurality of metal roof outer plates; wherein a vapor barrier film is laid above the main purlin; the metal roof inner plate is connected above the main purlin through a base protruding from the metal roof inner plate; the insulation rock wool board is laid above the vapor barrier film; a waterproof roll is laid above the insulation rock wool board; the area of the insulation rock wool board covering the base forms a boss protruding from the top surface of the insulation rock wool board; the support is connected to the top surface of the base through a connecting piece penetrating the waterproof roll; and the plurality of metal roof outer plates are arranged above the waterproof roll, and are locked with each other and connected to the top surface of the base through the support when connected, the insulation rock wool board and the base are arranged between the metal roof inner plate and the metal roof outer plate, the traditional double-layer purlin is cancelled, only the main purlin is reserved, and the upper-level purlin is cancelled, so that the insulation layer is not limited by the height of the upper-level purlin, the thickness of the insulation layer is reserved, and the insulation performance of the roof system is improved.

[0024] 2. As a preferred embodiment of the application, the metal roof inner plate is in a wave shape, and the wave crest section and the wave trough section of the metal roof inner plate are in a plane shape. The metal roof inner plate is arranged in a wave shape, the sizes of the wave crest section and the wave trough section are equal, each metal roof inner plate has a dense-rib structure form with at least 20 wave crest sections and 20 wave trough sections, so that the longitudinal bending strength of the metal roof inner plate is greatly improved, the metal roof inner plate can be directly used as a high-altitude platform during on-site construction, personnel safety is ensured, the spacing between the wave crest sections can be calculated according to the modulus of the effective coverage width of the metal roof outer plate, so that the installation and positioning accuracy of the base is further improved, the effective coverage width of the metal roof outer plate can be accurately controlled during on-site construction, and the installation accuracy of the metal roof outer plate is further ensured.

[0025] 3. As a preferred embodiment of the utility model, the base comprises a base body, symmetrical supporting edges are connected to the two sides of the base body, and the supporting edges and the base body form a U-shaped structure; the supporting edges can be embedded in the trough section, the supporting edges have a plurality of pre-punching holes, and the supporting edges are fixedly connected with the trough section by connecting pieces inserted into the pre-punching holes. The top surface of the base body of the base is a planar structure, the symmetrical supporting edges on the two sides are planar structures, and the supporting edges are arranged in parallel with the top surface of the base body. The height of the base body needs to be adjusted according to the thickness of the thermal insulation rock wool board, so that the area of the base body covered by the thermal insulation rock wool board can protrude from the top surface of the thermal insulation rock wool board, thereby facilitating the positioning of the support connection in the next step and realizing the precise assembly of the support. In addition, the purpose of the plurality of pre-punching holes in the supporting edge is to facilitate the insertion of the connecting piece, so as to fix and connect the supporting edge and the trough section of the inner metal roof panel through the connecting piece.

[0026] 4. As a preferred embodiment of the utility model, the metal roof outer panel comprises an outer panel body, a female rib in a trapezoidal structure connected to one side of the outer panel body, and a male rib in a trapezoidal structure connected to the other side of the outer panel body. The female rib in a trapezoidal structure and the male rib in a trapezoidal structure improve the longitudinal stiffness of the metal roof outer panel.

[0027] 5. As a preferred embodiment of the utility model, the female rib has a first hook, and the male rib has a second hook; the first hook of the female rib of one of the two adjacent metal roof outer panels is connected with the second hook of the male rib of the other one, the support has a locking part extending between the first hook and the second hook, and the first hook, the second hook and the locking part are bent to realize locking connection. The design of the first hook and the second hook enables the metal roof outer panel to have a self-locking function during on-site installation, thereby accelerating the construction speed. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the utility model and form a part of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0029] Figure 1 It is a structure diagram of a metal roof outer panel of a double-layer metal roof structure according to an embodiment of the utility model;

[0030] Figure 2 It is a structure diagram of a metal roof inner panel of a double-layer metal roof structure according to an embodiment of the utility model;

[0031] Figure 3 It is a structure diagram of a base of a double-layer metal roof structure according to an embodiment of the utility model;

[0032] Figure 4 Figure 1 is a disassembled structure diagram of a double-layer metal roof structure according to an embodiment of the present application;

[0033] Figure 5 Figure 2 is a cross-sectional structure diagram of the double-layer metal roof structure after assembly according to an embodiment of the present application;

[0034] Figure 6 Figure 3 is a side view structure diagram of the double-layer metal roof structure after assembly according to an embodiment of the present application;

[0035] Figure 7 Figure 4 is a state diagram of two metal roof outer plates of the double-layer metal roof structure not being locked according to an embodiment of the present application;

[0036] Figure 8 Figure 5 is a state diagram of the two metal roof outer plates of the double-layer metal roof structure being locked to form a 450° lock seam according to an embodiment of the present application;

[0037] Figure 9 Figure 6 is a state diagram of the two metal roof outer plates of the double-layer metal roof structure being locked to form a 540° lock seam according to an embodiment of the present application;

[0038] In the drawings,

[0039] 1, main purlin; 2, metal roof inner plate; 3, thermal insulation rock wool board; 4, support; 5, metal roof outer plate; 51, outer plate main body; 52, male rib; 53, female rib; 6, wave crest section; 7, wave trough section; 8, base; 81, base main body; 82, support edge; 9, first hook; 10, second hook; 11, locking part; 12, vapor barrier film; 13, waterproof roll material; 14, pre-punching hole; 15, connecting piece. DETAILED DESCRIPTION

[0040] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other manners different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0041] In addition, in the description of the present application, it is understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection, still can be communication;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's interaction relationship.For the ordinary skilled in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0043] In the utility model, unless another definite provision and limitation, first feature is " on " or " under " second feature " can be first and second features direct contact, or first and second features indirectly contact by intermediate medium.In the description of the present specification, the description of reference terms " implementation " " example " " an embodiment " " show " or " concrete example " etc.mean that the concrete features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the present specification, the illustrative representation of above-mentioned term is not necessarily for the same embodiment or example.Moreover, the concrete features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way.

[0044] In order to more clearly explain the overall concept of the utility model, the following will be described in detail in an exemplary manner with reference to the accompanying drawings of the specification.

[0045] The utility model relates to a kind of double-layer metal roof structure, as shown in Figures 1-9 The utility model relates to a kind of double-layer metal roof structure, as shown in

[0046] The double-face metal roof structure of the present application comprises a main purlin 1, a metal roof inner plate 2, a thermal insulation rock wool board 3, a support 4 and a plurality of metal roof outer plates 5; wherein a vapor barrier film 12 is laid above the main purlin 1; the metal roof inner plate 2 is connected above the main purlin 1 through a base 8 protruding from the metal roof inner plate 2; the thermal insulation rock wool board 3 is laid above the vapor barrier film 12; a waterproof roll 13 is laid above the thermal insulation rock wool board 3; the area of the thermal insulation rock wool board 3 covering the base 8 forms a boss protruding from the top surface of the thermal insulation rock wool board 3; the support 4 is connected to the top surface of the base 8 through a connecting piece 15 penetrating through the waterproof roll 13; the plurality of metal roof outer plates 5 are arranged above the waterproof roll 13, and when connected, the adjacent two metal roof outer plates 5 are locked with each other and connected above the base 8 through the support 4; the thermal insulation rock wool board 3 and the base 8 are connected between the metal roof inner plate 2 and the metal roof outer plate 5 by arrangement, the traditional double-layer purlin is cancelled, only the main purlin 1 is reserved, and the upper-level purlin is cancelled, so that the thermal insulation layer is not limited by the height of the upper-level purlin, thereby the thickness of the thermal insulation layer is reserved, and the thermal insulation performance of the roof system is enhanced.

[0047] In actual application, the metal roof inner plate 2 is laid on the upper flange of the main purlin 1, and the longitudinal length direction of the metal roof inner plate 2 is perpendicular to the length direction of the main purlin 1. The plate length of the metal roof inner plate 2 can be overlapped on the upper flange of the main purlin 1, and the overlapping length is 100 mm; the vapor barrier film 12 is laid on the upper surface of the metal roof inner plate 2, and the vapor barrier film 12 should be laid perpendicular to the direction of the main purlin 1, and the overlapping width is 50 mm; the two branch edges 82 of the base 8 are placed in the trough section 7 of the metal roof inner plate 2, and the arrangement interval is required according to the plate width module of the metal roof outer plate 5, and one is arranged every 6 peak sections 6, i.e. 600 mm, which is the same as the effective width of the metal roof plate;

[0048] Pre-punching holes 14 are formed in the two side edges 82 of the base 8 for placing connecting members 15, preferably carbon steel structure nails, which penetrate the vapor barrier 12 and the inner metal roof panel 2 to fix the base 8 to the upper flange of the main purlin 1 and connect at least one structure nail between two adjacent bases 8 to enhance the connection strength between the inner metal roof panel 2 and the main purlin 1. The insulating rock wool board 3 is laid on the upper surface of the inner metal roof panel 2 and the vapor barrier 12, and the joint between the insulating rock wool board 3 and the vapor barrier 12 is tightly sealed to avoid the cold bridge phenomenon caused by the temperature difference between indoor and outdoor. The insulating rock wool board 3 is cut on site when it meets the base 8, and the cut insulating rock wool board 3 is inserted into the cavity of the base 8. The waterproof roll 13 is laid on the top surface of the insulating rock wool board 3 in a direction perpendicular to the main purlin 1. The width of the waterproof roll 13 is 1880mm, and the insulating rock wool board 3 and the waterproof roll 13 are overlapped by 80mm through hot air welding. Because the top surface of the base 8 is 10-15mm higher than the top surface of the insulating rock wool board 3, the overlapping position of the waterproof roll 13 is away from the base 8, and the surface of the waterproof roll 13 is convex when it contacts each base 8, which facilitates the accurate positioning of the support 4 on the convex top surface during the subsequent installation of the outer metal roof panel 5.

[0049] Then the first outer metal roof panel 5 is fixed at the position corresponding to the convexity of the waterproof roll 13 through the connecting member 15. The support 4 is fixed to the top surface of the base 8 through at least two connecting members 15 that penetrate the top surface of the waterproof roll 13, as shown in Figure 4 Then the second outer metal roof panel 5 is vertically lifted from the panel width direction, and one side of the female rib 53 of the second outer metal roof panel 5 is lowered first, so that the edge of the female rib 53 of the second outer metal roof panel 5 is hooked on the second hook 10 of the male rib 52 of the first outer metal roof panel 5. Then the side of the male rib 52 of the second outer metal roof panel 5 is lowered smoothly, and the female rib 53 of the second outer metal roof panel 5 rotates around the male rib 52 of the first outer metal roof panel 5 until the second outer metal roof panel 5 is completely lowered. At this time, the self-locking process between the male and female ribs 53 of the first and second outer metal roof panels 5 is completed, and the appearance of the outer metal roof panel 5 remains unchanged.

[0050] As a preferred embodiment, the inner metal roof panel 2 has a wave-shaped structure, and the wave crest 6 and the wave trough 7 of the inner metal roof panel 2 have a planar structure.

[0051] The metal roof inner plate 2 is waved, the sizes of the peak section 6 and the valley section 7 are equal, each metal roof inner plate 2 has a multi-rib structure form of at least 20 peak sections 6 and 20 valley sections 7, thereby greatly improving the longitudinal bending strength of the metal roof inner plate 2, thereby being able to cooperate with the pressing of the steel plate with a strength of 550 MPa or more, so that the metal roof inner plate 2 can be directly used as a high-altitude platform during on-site construction, ensuring personnel safety; the peak section 6 spacing can be calculated according to the modulus of the effective coverage width of the metal roof outer plate 5, thereby further realizing the installation and positioning accuracy of the base 8 described below, so that the effective coverage width of the metal roof outer plate 5 can be accurately controlled during on-site construction, further ensuring the installation accuracy of the metal roof outer plate 5, the metal roof inner plate 2 is placed on the main purlin 1, and the constraint on the purlin system is extremely strong, can be used as a construction platform, facilitates hanging, improves the safety of roof installation, and also considers the maintenance of the roof later.

[0052] As a preferred embodiment, the base 8 comprises a base body 81, and symmetrical branch edges 82 are connected to both sides of the base body 81, and the branch edges 82 and the base body 81 are connected to form a few-shaped structure; the branch edges 82 can be embedded in the valley section 7, and the branch edges 82 have a plurality of pre-punching holes 14, and the branch edges 82 and the valley section 7 are fixedly connected by being worn in the pre-punching holes 14 through connecting pieces 15.

[0053] The top surface of the base body 81 of the base 8 is a planar structure, the branch edges 82 symmetrically arranged on both sides are planar structures, and the branch edges 82 are arranged in parallel with the top surface of the base body 81, and the height of the base body 81 needs to be adjusted according to the thickness of the thermal insulation rock wool board 3, so that the area of the base body 81 covered by the thermal insulation rock wool board 3 can protrude from the top surface of the thermal insulation rock wool board 3, thereby facilitating the positioning of the subsequent connection of the support 4 and realizing the precise assembly of the support 4. In addition, the purpose of the plurality of pre-punching holes 14 on the branch edges 82 is to facilitate the wearing of the connecting pieces 15, thereby fixing and connecting the branch edges 82 and the valley section 7 of the metal roof inner plate 2 through the connecting pieces 15.

[0054] Further, the height of the base 8 is 10-15 mm higher than the thickness of the thermal insulation rock wool board 3. The height of the base 8 is 10-15 mm higher than the thickness of the thermal insulation rock wool board 3, so that the thermal insulation rock wool board 3 can protrude from the top surface of the thermal insulation rock wool board 3 when covering the base 8, thereby providing an installation position for the subsequent installation of the support 4 and facilitating the precise installation of the support 4.

[0055] Further, the two side supporting edges 82 have a width of no less than 24 mm, and the base body 81 has a width of no less than 60 mm. The base 8 is made of galvanized steel plate with a yield strength of no less than 350 MPa and a thickness of no less than 1.8 mm. The base body 81 is parallel to the two side supporting edges 82. The width of the base body 81 is no less than 60 mm, and the width of the side supporting edges 82 is no less than 24 mm. The side supporting edges 82 are provided with a plurality of pre-punching holes 14 with a diameter of 7 mm, which facilitates the on-site fixed connection with the main purlin 1.

[0056] As a preferred embodiment, the metal roof outer plate 5 comprises an outer plate body 51, a female rib 53 in trapezoidal structure connected to one side of the outer plate body 51, and a male rib 52 in trapezoidal structure connected to the other side of the outer plate body 51. The female rib 53 in trapezoidal structure and the male rib 52 in trapezoidal structure improve the longitudinal rigidity of the metal roof outer plate 5.

[0057] Further, the female rib 53 is provided with a first hook 9, and the male rib 52 is provided with a second hook 10. The first hook 9 of the female rib 53 of one of the two adjacent metal roof outer plates 5 is connected with the second hook 10 of the male rib 52 of the other of the two adjacent metal roof outer plates 5. The support 4 is provided with a locking part 11 extending between the first hook 9 and the second hook 10. The first hook 9 and the second hook 10 are designed to have a self-locking function during on-site installation of the metal roof outer plate 5, thereby accelerating the construction speed.

[0058] During use, the first hook 9 of the female rib 53 of one of the two adjacent metal roof outer plates 5 is connected with the second hook 10 of the male rib 52 of the other of the two adjacent metal roof outer plates 5. Since the locking part 11 of the support 4 extending between the first hook 9 and the second hook 10, when the three are connected, the first hook 9 and the locking part 11 and the second hook 10 are bent at different angles, thereby realizing the connection between the two connected metal roof outer plates 5, as shown in FIG. 4, which is the state of the first hook 9 and the second hook 10 and the locking part 11 not being locked, as shown in FIG. 5, which is the state of the first hook 9 and the second hook 10 and the locking part 11 being connected and bent to one side by 450°, as shown in FIG. 6, which is the state of the first hook 9 and the second hook 10 and the locking part 11 being connected and bent to one side by 540°. Figure 7 Figure 8 Figure 9

[0059] ​​​As a preferred embodiment, the metal roof outer plate 5 adopts a steel plate with a thickness of 0.53mm-0.6mm and a strength of 300MPa-350MPa; and the metal roof inner plate 2 adopts a steel plate with a thickness greater than 0.4mm and a strength of 500MPa-550MPa.

[0060] The metal roof outer plate 5 is designed as a standing seam roof plate suitable for various types of roofs, has good wind and rain prevention performance and sliding performance suitable for thermal expansion and contraction of the roof; the metal roof outer plate 5 preferably adopts a 0.53mm or 0.6mm thick steel plate with a strength of 350Mpa. The metal roof outer plate 5 adopts a surface hot-dip aluminum-zinc-based color steel plate or an aluminum-zinc-plated AZ150 with high durability polyester HDP / PVDF color coating; and the metal roof inner plate 2 preferably adopts a 0.4mm thick 550MPa high-strength high-quality steel plate, and the surface treatment is hot-dip galvanizing Z120 or aluminum-zinc-plated AZ70 with polyester PE color coating.

[0061] As a preferred embodiment, the waterproofing membrane 13 adopts TPO or PVC material, and the thickness of the waterproofing membrane 13 is not less than 1.2mm. When the waterproofing membrane 13 is made of TPO or PVC, the thickness should be greater than or equal to 1.2mm; and when the waterproofing membrane 13 is used in a metal roof primary waterproofing project, the thickness of the waterproofing membrane 13 should be greater than or equal to 1.5mm.

[0062] As a preferred embodiment, the thermal insulation rock wool board 3 has a volume weight greater than or equal to 120K / m3; and the vapor barrier film 12 is made of PE and has a thickness greater than or equal to 0.3mm.

[0063] In summary, the utility model cancels the conventional upper-level purlin, greatly reduces the thermal bridge effect at the roof purlin, saves the steel quantity of the structure, and saves the labor during the on-site installation of the secondary purlin; in combination with the adjustable height base 8 and the thermal insulation rock wool board 3 with different thickness requirements, the entire roof system has excellent thermal insulation performance; meanwhile, a layer of waterproofing membrane 13 is added to the thermal insulation rock wool board 3, which meets the requirements of the metal roof primary waterproofing, and a gap cavity is left between the top surface of the waterproofing membrane 13 and the metal roof outer plate, which can better promote the circulation of hot air under the metal roof outer plate 5 and avoid the generation of condensed water; in addition, the effective widths of the metal roof outer plate 5 and the metal roof inner plate 2 are designed in a modular manner, which can ensure the installation accuracy of the metal roof outer plate 5; the metal roof inner plate 2 is pre-installed by using high-strength plate materials in a factory, and is designed in a wavy and dense-ribbed form, so that the plate material longitudinal section stiffness of the formed metal roof inner plate 2 is greatly improved; the metal roof inner plate 2 placed above the main purlin 1 can also serve as a construction platform, has strong constraints on the purlin system, is convenient to hang, saves engineering investment, speeds up the on-site installation and the overall construction progress of the project, improves the safety of roof installation, and also considers the maintenance of the roof in the later period.

[0064] The unmentioned parts in the utility model can be realized by using or referring to the existing technology.

[0065] Each embodiment in the specification adopts a progressive manner for description, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0066] The above only describes the embodiments of the utility model, and is not used for limiting the utility model. The utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the claim range of the utility model.

Claims

1. A double-layer metal roof structure, characterized in that: include: main purlin; Metal roof inner panels with vapor barrier membrane laid on top; The metal roof inner plate is connected to the upper part of the main purlin via a base protruding from the metal roof inner plate; Thermal insulation rock wool board, laid above the vapor barrier membrane; A waterproof roll is laid on the thermal insulation rock wool board; the area of ​​the thermal insulation rock wool board covering the base forms a boss protruding from the top surface of the thermal insulation rock wool board; A support, connected to the top surface of the base via a connector passing through the waterproof membrane; A plurality of metal roof outer panels, two adjacent metal roof outer panels are locked with each other and connected above the base through the support.

2. A double-layer metal roof structure according to claim 1, characterized in that: The metal roof inner plate has a wave-like structure, and the wave crest section and the wave trough section of the metal roof inner plate have a planar structure.

3. A double-layer metal roof structure according to claim 2, characterized in that: The base comprises a base body, and supporting edges are symmetrically connected to both sides of the base body, and the supporting edges are connected to the base body to form an X-shaped structure.

4. A double-layer metal roof structure according to claim 3, characterized in that: The support edge can be embedded in the trough section. The support edge has a plurality of pre-punched holes. The support edge and the trough section are fixedly connected by connecting pieces inserted into the pre-punched holes.

5. The double-layer metal roof structure according to claim 3, characterized in that: The width of the supporting edges on both sides is not less than 24 mm, and the width of the base body is not less than 60 mm.

6. The double-layer metal roof structure according to claim 1, characterized in that: The height of the base is 10-15 mm higher than the thickness of the thermal insulation rock wool board.

7. The double-layer metal roof structure according to claim 1, characterized in that: The metal roof outer plate comprises an outer plate body, female ribs in a trapezoidal structure connected to one side of the outer plate body, and male ribs in a trapezoidal structure connected to the other side of the outer plate body.

8. The double-layer metal roof structure according to claim 7, characterized in that: The female rib has a first hook, and the male rib has a second hook; the first hook of the female rib of one of the two adjacent metal roof outer panels is hooked and connected with the second hook of the male rib of the other one, and the support has a locking portion extending between the first hook and the second hook, and the locking connection is achieved by bending the first hook, the second hook and the locking portion.

9. The double-layer metal roof structure according to claim 1, characterized in that: The metal roof outer plate is made of steel plate with a thickness of 0.53mm-0.6mm and a strength of 300MPa-350MPa; the metal roof inner plate is made of steel plate with a thickness greater than 0.4mm and a strength of 500MPa-550MPa.

10. The double-layer metal roof structure according to claim 1, characterized in that: The waterproof roll is made of TPO or PVC, and the thickness of the waterproof roll is not less than 1.2 mm.

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